feat: Add VitePress docs, EPUB to PDF tool, Phosphor icons, and licensing updates

- Set up VitePress documentation site (docs:dev, docs:build, docs:preview)
- Added Getting Started, Tools Reference, Contributing, and Commercial License pages
- Created self-hosting guides for Docker, Vercel, Netlify, Cloudflare, AWS, Hostinger, Nginx, Apache
- Updated README with documentation link, sponsors section, and docs contribution guide

- Added EPUB to PDF converter using LibreOffice WASM

- Migrated to Phosphor Icons for consistent iconography

- Added donation ribbon banner on landing page
- Removed 'Like My Work?' section (replaced by ribbon)
- Updated licensing.html with delivery model, AGPL notice, invoicing, and no-refund policy

- Added Commercial License documentation page
- Updated translations table (Chinese added, marked non-English as In Progress)

- Added sponsors.yml workflow for auto-generating sponsor avatars

docs/self-hosting/netlify.md

@@ -0,0 +1,92 @@
+# Deploy to Netlify
+
+[Netlify](https://netlify.com) provides excellent static site hosting with a generous free tier.
+
+## One-Click Deploy
+
+[![Deploy to Netlify](https://www.netlify.com/img/deploy/button.svg)](https://app.netlify.com/start/deploy?repository=https://github.com/bentopdf/bentopdf)
+
+## Manual Deployment
+
+### Step 1: Connect Repository
+
+1. Log in to [Netlify](https://app.netlify.com)
+2. Click "Add new site" → "Import an existing project"
+3. Connect your GitHub account
+4. Select your BentoPDF fork
+
+### Step 2: Configure Build Settings
+
+| Setting | Value |
+|---------|-------|
+| Build command | `npm run build` |
+| Publish directory | `dist` |
+| Node version | 18+ |
+
+### Step 3: Deploy
+
+Click "Deploy site" and wait for the build.
+
+## Configuration File
+
+Create `netlify.toml` in your project root:
+
+```toml
+[build]
+  command = "npm run build"
+  publish = "dist"
+
+[build.environment]
+  NODE_VERSION = "18"
+
+# SPA routing
+[[redirects]]
+  from = "/*"
+  to = "/index.html"
+  status = 200
+
+# Cache WASM files
+[[headers]]
+  for = "*.wasm"
+  [headers.values]
+    Cache-Control = "public, max-age=31536000, immutable"
+    Content-Type = "application/wasm"
+```
+
+## Environment Variables
+
+Set these in Site settings → Environment variables:
+
+| Variable | Description |
+|----------|-------------|
+| `SIMPLE_MODE` | Set to `true` for minimal build |
+
+## Custom Domain
+
+1. Go to Site settings → Domain management
+2. Click "Add custom domain"
+3. Follow DNS configuration instructions
+
+## Large Media
+
+For large WASM files, consider enabling [Netlify Large Media](https://docs.netlify.com/large-media/overview/):
+
+```bash
+netlify lm:setup
+git lfs track "*.wasm"
+```
+
+## Troubleshooting
+
+### Build Fails
+
+Check Node version compatibility:
+
+```toml
+[build.environment]
+  NODE_VERSION = "20"
+```
+
+### Slow Initial Load
+
+Enable asset optimization in Site settings → Build & deploy → Asset optimization.